#ed_op#DIV#ed_cl#Found these at WallyWorld for $6 or $7 each and figured I've give'm a shot. The 'probe' claims to be water resistant to 10' (I doped up the connector where the wires enter the probe with a dab of silicone just for good measure anyhows).#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#IMG alt="image file name: 2k88fed8aabb.jpg" src="http://www.captivereefing.com/richedit/upload/2k88fed8aabb.jpg" border=0#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Tested them against a few known accurrate thermometers and they were dead on. So I putone on the 180 and the other on my 10g nano.... As you can see the air temp in my office is a little chilly, but the tank is fine.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#IMG alt="image file name: 2kea9ef27c93.jpg" src="http://www.captivereefing.com/richedit/upload/2kea9ef27c93.jpg" border=0#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#Next step should be obvious, as I really don't care what the air temp is, needtohack ononeto see if I can extend the thermistor for the 'inside' temp to measure temps at the top and bottom of the tank, or the difference between the sump/fuge and tank or whatever.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#